:root {
    --primary-blue: #0a66c2;
    --bg-gray: #f3f2ef;
    --card-white: #ffffff;
    --text-dark: #191919;
    --text-gray: #666666;
    --border-light: #e0dfdc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--bg-gray);
    color: var(--text-dark);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
}

.container {
    max-width: 1128px;
    width: 100%;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 20px;
    align-items: start;
}

/* --- Sidebar / Profile Card --- */
.profile-card {
    background: var(--card-white);
    border-radius: 12px;
    box-shadow: 0 0 0 1px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
    overflow: hidden;
    position: sticky;
    top: 20px;
}

.banner {
    height: 60px;
    background: linear-gradient(135deg, #1a7db3, #003b6f);
}

.profile-header {
    text-align: center;
    padding: 0 20px 20px;
    margin-top: -40px;
}

.avatar-img {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    margin: 0 auto 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: block;
    background: #dce6f1; /* fallback */
}

.profile-name {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.profile-title {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-gray);
    margin-bottom: 16px;
}

.profile-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-blue);
    color: #fff;
}

.btn-primary:hover {
    background: #004182;
    transform: scale(1.02);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-secondary:hover {
    background: rgba(10, 102, 194, 0.1);
    transform: scale(1.02);
}

.divider {
    height: 1px;
    background: var(--border-light);
    margin: 16px 20px;
}

.contact-info {
    padding: 0 20px 20px;
    font-size: 14px;
    color: #555;
    line-height: 1.8;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}

.contact-info i {
    width: 18px;
    color: #777;
}

.contact-info a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}
.contact-info a:hover {
    text-decoration: underline;
    color: #004182;
}

.social-links {
    padding: 0 20px 20px;
}

.social-links p {
    font-size: 13px;
    color: #777;
    margin-bottom: 6px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.social-links a,
.social-links span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    transition: color 0.2s;
    text-decoration: none;
}

.social-links a {
    color: var(--primary-blue);
}
.social-links a:hover {
    color: #004182;
    text-decoration: underline;
}
.social-links span {
    color: var(--text-dark);
    cursor: default;
}

/* --- Main Content --- */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    background: var(--card-white);
    border-radius: 12px;
    box-shadow: 0 0 0 1px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
    padding: 20px;
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 0 0 1px rgba(0,0,0,0.08), 0 8px 16px rgba(0,0,0,0.08);
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.3px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-title i {
    color: var(--primary-blue);
    margin-right: 8px;
}

/* Summary / About */
.about-text {
    font-size: 14px;
    line-height: 1.7;
    color: #444;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 16px;
}

.stat-item {
    text-align: center;
    background: #f8f9fa;
    padding: 10px 6px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
}

.stat-number {
    display: block;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--text-gray);
    font-weight: 500;
}

/* Timeline */
.timeline-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-light);
}

.timeline-item:last-child {
    border-bottom: 0;
    margin-bottom: 0;
    padding-bottom: 0;
}

.timeline-date {
    font-size: 14px;
    color: var(--text-gray);
    font-weight: 500;
    line-height: 1.4;
}

.timeline-content {
    word-break: break-word;
}

.timeline-content h4 {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 2px;
}

.timeline-content .institution {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 6px;
}

.timeline-content ul {
    list-style: none;
    padding-left: 0;
    font-size: 14px;
    line-height: 1.6;
    color: #444;
}

.timeline-content ul li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 4px;
}

.timeline-content ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* Skills */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    background: #eef3f8;
    color: var(--text-dark);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: default;
}

.skill-tag:hover {
    background: #dce6f1;
    transform: translateY(-2px);
}

/* Badge */
.badge {
    display: inline-block;
    background: #e8f0fe;
    color: var(--primary-blue);
    font-size: 12px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 12px;
    margin-left: 6px;
}

/* Responsive */
@media (max-width: 850px) {
    .container {
        grid-template-columns: 1fr;
    }
    .profile-card {
        position: relative;
        top: 0;
    }
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 4px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .profile-actions .btn {
        width: 100%;
        justify-content: center;
    }
}